Correcting After Abnormal Completion Of The Test Run; 18 Hand-Over To The User; Troubleshooting; Solving Problems Based On Error Codes - Daikin VRV IV+ RXYTQ8U5/U7YF Installation And Operation Manual

17.5 Correcting after abnormal
completion of the test run
The test operation is only completed if there is no malfunction code
displayed on the user interface or outdoor unit 7‑segment display. In
case of a displayed malfunction code, perform correcting actions as
explained in the malfunction code table. Carry out the test operation
again and confirm that the abnormality is properly corrected.
INFORMATION
Refer to the installation manual of the indoor unit for
detailed malfunction codes related to indoor units.
18 Hand-over to the user
Once the test run is finished and the unit operates properly, please
make sure the following is clear for the user:
▪ Make sure that the user has the printed documentation and ask
him/her to keep it for future reference. Inform the user that he can
find the complete documentation at the URL mentioned earlier in
this manual.
▪ Explain the user how to properly operate the system and what to
do in case of problems.
▪ Show the user what to do for the maintenance of the unit.
19.2

Error codes: Overview

In case other error codes appear, contact your dealer.
Main code
Master
RXYTQ
VRV IV+ heat pump for high ambient temperatures
4P546223-1C – 2021.11
Sub code
Slave 1 Slave 2
Earth leakage detector activated
Earth leakage detector malfunction:
open circuit) - A1P (X101A)
High pressure switch was activated
(S1PH, S2PH) - A1P (X2A , X3A)
▪ Refrigerant overcharge
▪ Stop valve closed
Stop valve closed (liquid)
▪ Refrigerant overcharge
▪ Stop valve closed
Low pressure malfunction:
▪ Stop valve closed
▪ Refrigerant shortage
▪ Indoor unit malfunction
Electronic expansion valve malfunction
(main) (Y1E) - A1P (X21A)
Electronic expansion valve malfunction
(liquid cooling) (Y3E) - A1P (X23A)
Electronic expansion valve malfunction
(subcool) (Y2E) - A1P (X22A)

18 Hand-over to the user

19

Troubleshooting

19.1 Solving problems based on error
codes
In case of a displayed malfunction code, perform correcting actions
as explained in the malfunction code table.
After correcting the abnormality, press BS3 to reset the malfunction
code and retry operation.
The malfunction code which is displayed on the outdoor unit will
indicate a main malfunction code and a sub code. The sub code
indicates more detailed information about the malfunction code. The
malfunction code will be displayed intermittent.
Example:
Code
Main code
Sub code
With an interval of 1 second, the display will switch between main
code and sub code.
Cause
Restart the unit. If the problem
reoccurs, contact your dealer.
Check connection on PCB or actuator.
Check stop valve situation or
abnormalities in (field) piping or airflow
over air cooled coil.
▪ Check refrigerant amount+recharge
unit.
▪ Open stop valves
Open liquid stop valve.
▪ Check refrigerant amount+recharge
unit.
▪ Open stop valves.
▪ Open stop valves.
▪ Check refrigerant amount+recharge
unit.
▪ Check the user interface's display or
transmission wiring between the
outdoor unit and the indoor unit.
Check connection on PCB or actuator.
Check connection on PCB or actuator.
Check connection on PCB or actuator
Example
Solution
Installation and operation manual
33